MM-52325: Bump morph (#23394)

This is needed to implement non-transactional migrations

https://mattermost.atlassian.net/browse/MM-52325
```release-note
NONE
```

Co-authored-by: Mattermost Build <build@mattermost.com>

.github/workflows/server-ci-template.yml

@@ -224,7 +224,7 @@ jobs:
     needs: check-mattermost-vet
     uses: ./.github/workflows/server-test-template.yml
     with:
-      datasource: mmuser:mostest@tcp(mysql:3306)/mattermost_test?charset=utf8mb4,utf8&multiStatements=true
+      datasource: mmuser:mostest@tcp(mysql:3306)/mattermost_test?charset=utf8mb4,utf8&multiStatements=true&maxAllowedPacket=4194304
       drivername: mysql
   build-mattermost-server:
     name: Build mattermost-server